class_docstr: A RetryError encapsulates the last Attempt instance right before giving up.
code: def __init__(self, last_attempt):
      self.last_attempt = last_attempt
  
imports: import random
  import six
  import sys
  import time
  import traceback
label_desc: Use image node_id 1 to create a new RetryError object from inherited base classes: Exception with example: obj = RetryError(last_attempt)